Petroleum Science >2009, Issue 4: 426-432 DOI: https://doi.org/10.1007/s12182-009-0065-1
Exploitation of methane in the hydrate by use of carbon dioxide in the presence of sodium chloride Open Access
文章信息
作者：Li Zunzhao,Guo Xuqiang,Yang Lanying and Ma Xiaona
作者单位：
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
投稿时间：2009-12-31
引用方式：Li, Z., Guo, X., Yang, L. et al. Pet. Sci. (2009) 6: 426. https://doi.org/10.1007/s12182-009-0065-1
文章摘要
The replacement process of CH4 from CH4 hydrate formed in NaCl solution by using pressurized CO2 was investigated with a self-designed device at temperatures of 271.05, 273.15 and 275.05 K and a constant pressure of 3.30 MPa. The mass fraction of the NaCl solution was either 0.5 wt% or 1.0 wt%. The effects of temperature and concentration of NaCl solution on the replacement process were investigated. Experimental results showed that high temperature was favorable to the replacement reaction but high NaCl concentration had a negative effect on the replacement process. Based on the experimental data, kinetic models of CH4 hydrate decomposition and CO2 hydrate formation in NaCl solution were established. The calculated activation energies suggested that both CH4 hydrate decomposition and CO2 hydrate formation are dominated by diffusion in the hydrate phase.
关键词
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CO2 hydrate, CH4 hydrate, guest molecule replacement, kinetic model